According to the Self-Regulatory Perseveration Theory of Depression

According to the self-regulatory perseveration theory of depression:

A) depression occurs when people shift all their attention away from their self-concept.
B) ego depletion is the primary cause of depression.
C) depression is the result of inability to find any meaningful goal to commit to.
D) depression results from an inability to disengage from a goal that the person cannot achieve.